Efficiency of the bowen fluorescence mechanism in static nebulae.
Abstract
A simplified theory of the Bowen resonance fluorescence mechanism is presented for both the pumping of the O III Bowen lines by He II 304 A and for the pumping of the N III Bowen lines by O III 374 A. Theoretical results, calculated on the basis of an escape probability approximation for resonance line transfer, obey simple scaling laws. The O III Bowen fluorescence yields calculated for a model planetary nebula agree well with those obtained in more rigorous calculations by Weymann and Williams and by Harrington. Intensities of O III and N III Bowen lines observed in the spectra of planetary nebulae and compact X-ray sources are discussed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1980
- DOI:
- 10.1086/158498
- Bibcode:
- 1980ApJ...242..615K
- Keywords:
-
- Atomic Spectra;
- Line Spectra;
- Planetary Nebulae;
- Resonance Fluorescence;
- Absorption Spectra;
- Astronomical Models;
- Helium;
- Nitrogen;
- Oxygen;
- Transition Probabilities;
- X Ray Sources;
- Astrophysics